Fuel-feeding device for explosive-engines



E. S. CHURCH.

FUEL FEEDING DEVICE FOR EXPLOSIVE ENGINES. APPLICATION FILED 'qcnzr, 191s.

Patented Dec. 14, 1920.

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E. S. CHURCH. FUEL FEEDING DEVICE FOR EXPLOSIVE ENGINES.

APPLICAUON FILED OCT. 21,1916. 1,362,394. Patented Dec. 14, 1920.

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UNITED STATES PATENT OFFICE.

EDMUND S. CHURCH, OF CHICAGO, ILLINOIS,

. 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLHQOIS.

ASSIGNOR 'I'O' AUTOMATIC FUEL-FEEDING DEVICE FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Application filed October 21, 1916. SeIiaI No. 126,881.

To all whom it may concern:

Be it known that I, EDMUND a citizen of the United States, dent of Chicago, State of Illinois, have invented certain new and useful Improvements in Fuel-Feeding Devices for Explosive-Engines, of which the following is a full, clear, and exact description.

The invention relates to fuel feeding devices for explosive engines.

One object of the invention is to provide an S. CHURCH,

improved fuel feeding device for carbureters in which the suction produced by the engine is not used to lift the fuel into the feed tank and this object is attained by utilizing a jet in which a fluid under ressure serves as the motive fluid for li ting the liquid from the reservoir into the feed-' tank.

A further object of the invention is.to provide an improved fuel feeding device in which fluid under pressure from one or more of the Working cylinders is utilized as the motive fluid for the lifting jet.

A still further object of the invention is to provide an improved fuel feeding device by which the vapor in the feed tank will be delivered to and utilized in the carbureter for consumption in the engine.

A further object of the invention is to I provide an improved fuel feeding device which is simple in construction and efficient in operation.

The invention consists in the several novel features hereinafter set forth and more parclaims at the conclusion hereof.

In the drawings: Figure 1 is a side elevation of an engine having the invention ap-.-

plied thereto. Fig. 2 18 a section of the car bureter, showing the connection for delivering vapor from the feed-tank for consumption in the engine. Fi 3' is a horizontal section through the feed tank. Fig. 4 is a vertical section of the feed tank taken on line 4-4 of Fig. 3. Fig. 5 is a section taken on line 5-5 of Fig. 3 and Fig. 6 is a section taken on line 6-6 of Fig 3.

The en ine comprises working cylinders 8 in any d esired number, a piston 9 working in each cylinder, a spark plug 10 for each cylinder for igpiiting the compressed fuel therein and a suitable intake manifold 11 for delivering vaporized fuel from the carand a resiin the county'of Cook and r secured between the Patented Dec. 14, 1920.

CARBURETOB burete r to the intake of the engine. All of these parts may be of usual construction and it will be understood that the usual inlet and exhaust valves are provided, as well understood in the art. A tank 12 for feeding liquid fuel to the carburetor is suitably sustained at a point near the carburetor,

terminals of the intake pipe 11 and the carburetor, the tank being secured in any suitable manner to an extension of the plate, so that the tank will be supported thereby. Tank 12 comprises a cylindrical body usually of glass, or transparent material, a base 12 and a cover 12 WlllCh are secured tank by bolts 12. the fuel reservoir usually disposed at a lower level than the carbureter, to conduct liquid fuel, such as gasolene, to the feedtank 12. The pipe 14 is connected to a nipple 15 which is connected to the base 12 of tank 12 by a union 16. A laterally extending duct 17 is formed in said base to conduct liquid fuel from the pipe 14 to a chamber 18 around a nozzle 19 which is secured in said base. From the chamber 18, the liquid is forced by motive fluid issuing from nozzle 19 upwardly through a duct 20 and a tube 21 which extends upwardly from the base 12 to discharge the liquid above the normal level maintained in the tank. A chamber 22 for containing motive fluid for the nozzle 19 is formed in base 12".

A small pipe 23 conducts the fluid from a working cylinder 8 to the chamber 22, being connected to a nipple 24 secured in the base 12. Pipe 23 is connected to nipple 24 by a union coupling 25. A check valve 26 is provided to prevent backflow of fluid through the pipe 23 durin the suction'stroke of the piston in the working cylinder or cylinders from which fluid is taken. Valve 26 is slidably mounted in the base 12 and is weighted so it will be normally closed together to form a closed against a seat 27 in a plug 28 which is secured in the base 12. A removable plug 29 is screw-threaded to the base 12 to permit cleaning out or access to the chamber 22.

pipe 30 having its upper end open usually by a plate 14? A pipe 14 is connected to.

of the chamber.

zle 19 and suck liquid gasolene from the reservoir to which the pipe 14 is connected tice, is very small in diameter.

the predetermined level,

jector operated by fluid from a working cylinder of the engine to force liquid fuel into the feed tank. A clean-out needle 32 is provided for the duct 31 which, in prac- Fuel discharged from the upper end of tube 21 strikes a baflie or deflector 33 which deflects the fuel downwardly into the body of the tank 12. j

A valve 34 having its lower end extended supply, is slidable in a tube 36 and has its upper end connected to a pivotally sustained, as at 38, and is pivoted to a float 39 and to the stem of valve 36, as

at 40. When the liquid in tank 12 reaches the float 39 will rise and close valve 34 and prevent further delivery of the fuel into the tank until the liquid column again falls below the predetermined level.

When the liquid, particularly gasolene, 1s

discharged with the motive fluid into the tank, a considerable portion of it is vaporized and the invention provides for conducting this vapor to the carbureter. For this purpose a pipe 41 is suitably connected to the top 12" of the tank 12 and to a duct 42 in the carbureter which discharges into the choke or Venturi tube where it will be mixed with the air in the carbureter. A- screen 43 is secured adjacent the upper end of the tank 12 to break up this vapor. The carbureter shown is an example of one to which liquid and vapor will be supplied from the feed tank and comprises a casing 50 containing a chamber 51 for liquid fuel; an inlet valve 52 controlled by a float 53 to maintain a column of liquid of a predetermined height in the chamber 51; a nozzle 54' discharging into a choke-tube 55; a primary air inlet 56; and a secondary air inlet 5 controlled by a suitable spring-closed valve 58. The suction created by the working piston through the manifold 11 will create suction in. the tube to draw air through the inlet 56 and liquid fuel from the nozzle 54. The primary air and fuel from the nozzle 54 and vapor from duct 42 will be mixed and drawn upwardly through the outlet 57. Air from the secondary inlet 57 passes through a chamber 52 around the choke tube with the fluid from the tube, as well understood in the art. From the chamber 52 the mixture passes. through the mixture intake pipe 57*. A throttle 58 is provided in the pipe 57 a to control the volume of mixture to the engine.

The operation of the invention will be as follows: During the time discharged from of the liquid. is vaporized combustible mixture supplied to the engine.

'sion from the working cylinder is utiwhen the is under compression in the cylinder towhich the pipe 23 is connected and particularly when high pressure is developed in the cylinder as the result of the explosion, a comparatively small portion of the fluid from that cylinder will pass through pipe 23 and check-valve 26 into the chamber 22 in the base of the feed-tank. This fluid under pressure will pass through the very small central opening 31 in the nozzle 9 and through pipe 30. This opening is so small that there will be suflicient fluid under pressure in chamber 22 to create a suction in the chamber 18 around the nozzle19 to lift the liquid fuel from the reservoir and cause it to be sucked through pipe 14 and forced upwardly through thetube 21 into the feeduntil the column of liquid in the tank 12 reaches the predetermined level and then the float 39 will operate lever 37 to close valve 34 and cut off connection between the ipe-14 and the duct 17 which leads to the chamber 18 around the nozzle. The liquid the tube 21 is deflected downwardly vby the baffle 33. The tank 12 contains aconstant supply of liquid which will flow by gravity through the pipe 60 to the carbureter under control of the floatcontrolled valve 52. In discharging the liquid into tank 12 by means of a jet. a portion and this vapor will be sucked through pipe 41, duct 42, into the carbureter where it will enter the The invention thus exemplifies a device for feeding fuel to carbureters in which a jet is utilized to lift the gasolene into the feed tank; in which fluid under compreslized as the motive fluid for the jet to lift the fuel from the reservoir into the feed tank; and in which the vapor formed in the feed tank is utilized in the mixture supplied to the engine. I

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the ap; pended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent. is:

1. In a fuel feeding device for engines, the combination of a feed tank for containing liquid fuel for the engine, an injector for forcing liquid-fuel into. the tank, a carbureter to which liquid is conducted from said tank, and means for delivering motive fluidto the injector.

2. In a fuel feeding device for engines, the combination of a fuel reservoir, a tank for containing liquid fuel for the engine, an injector for forcing liquid from the fuel reservoir into the tank, an automatic cutoff means for conducting fuel from the tank to the carbureter, an injector for forcing liq- -uid' into the tank from the reservoir, and

means for delivering motive fluid to the injector.

4. In a fuel feeding device for engines, the combination of a' fuel reservoir, a tank for containing liquid fuel, a carburetor, means for conducting fuel from the tank to the carbureter, an injector in the bottom of the tank for forcing liquid from the fuel reservoir into the tank, means for conducting the liquid from the injector to the upper portion of the tank, and means for delivering motive fluid to the injector.

5. In a fuel feeding device for explosive 7 engines, the combination of a tank for con- 'taining liquid fuel, a carburetor connected to receive fuel from the tank, a reservoir connected to supply fuel to the tank, and means for delivering motive fluid from a working cylinder of the engine to act directly on the liquid fuel and force it from the reservoir to the tank. I

6. In a fuel feeding device for explosive engines, the combination of a fuel reservoir, a tank for containing liquid-fuel for the engine, an injector for forcing li uid fromthe fuel reservoir into the feed tan and means for delivering motive fluid from a working cylinder of the en ine to the injector.

7. In a fuel fe'e ing device for explosive engines, the combination of a fuel reservoir, a tank for containing liquid fuel, a carbureter, means for conducting liquid from the tank to the carbureter, an injector for forcing liquid from the fuel reservoir into the tank, and means for delivering motive fluid from a working cylinder of the engine to the injector. h v

8. In a fuel-feed d6V10B' for en 'nes, the combination ofa fuel reservoir, a eed tank, an injector for lifting li uid fuel into the tank, a chamber connects to the injector, a pipe for delivering liquid fuel from the reservoir to said chamber, means for deliveringfluid under pressure to the injector, and means for conducting liquid from the tank to a carbureter.

9. In a fuel-feed device for engines, the combination of a fuel reservoir, a feed tank, an injector for liftingliquid fuel into the tank, a chamber connected to the injector, a pipe for delivering liquid fuel from the reservoir to said chamber, means for delivering fluid under pressure to the injector, and a float valve for controlling the flow of liquid into the tank.

10. In a fuel feeding device for engines, the combination of a fuel reservoir, a feed tank, an injector for lifting liquid fuel from the reservoir into the tank, a carbureter, means for delivering liquid from the feed tank to the carbureter and a connection between the top of the feed tank and the carbureter for delivering vapor formed in the tank to the carbureter for delivery to the engine with the mixture from the carbureter. 11. In a fuel feeding device for engines,

the combination of a fuel reservoir, a feed tank, means for lifting liquid fuel from the reservoir into the feed tank, a b'afi le ihthe tank, a carburetor, means fordelivering.

liquid from the feed tank to the carbureter and a connection between the top of the feed tank and the carburetor for delivering vapor formed in the tank to the carburetor for delivery to the engine with. the mixture from the carbureter.

l2. In a fuel feeding device for engines, the combination of a fuel reservoir, a feed tank,means for lifting liquid fuel from the reservoir into the feed tank, a carbureter, means for delivering liquid from the feed tankto the carbureter, a connection between the top of the feed tank and the carburetor for delivering vapor formed in the tank to the carburetor for delivery to the engine with the mixture from the carburetor, and a screen in the tank for the vapor passing to said connection.

13. In a fuel feeding device for explosive engines, the combination of a fuel reservoir, a feed tank, a pipe for delivering liquid from the reservoir into the tank, and an injector for forcing the liquid through the pipe and into the tank, said injector comprising a duct for motive fluid, a chamber connected to the duct, means for delivering EDMUND S. CHURCH. K 

